Shifter design 101?

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Apr 22, 2002
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#1
How is a foot shifter manufactured? Companies like IMS appear to weld together two main parts: the throw arm and the clamp that slides onto the splined shaft. Honda shifters, however, appear to be cast as one piece. And how do they make those internal splines on the shifter and then have them match the splined shaft? Just one of those things I've always wondered about...
 

Rcannon

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Nov 17, 2001
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#2
Doug, My guess is that they make the spline section first. The splines could be broached (sort of pushed) into place.

Then if it is IMS....they get stupid drunk and weld the two pieces together. How else do you explain the need to buy three levers to find one that sits correctly?

I recently bought a Tusk model from Rocky Mountain. Not bad for 20.00. Workmanship is less than stellar, but the allignment is good.
 

SuzookKING

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Aug 31, 2002
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#3
Steel shifters usually will be multi-piece units welded up and the aluminum units are cast units that are then machined. The splines are then broached with tool steel on both units (steel & aluminum).